Sandpaper holder block

ABSTRACT

A sandpaper holder block having a head portion and a handle portion, the head portion having an anvil groove therein for receiving a protuberance on variously shaped anvils with an anvil clamp screw for locking the head portion around the protuberance; first and second paper clamp plates for receiving sandpaper between the head portion and the clamp plates together with a lever cam coupled to a clamping toggle pin for clamping the paper clamp plates against the paper and holding it in a fixed position around one of the variously shaped anvils.

Unite Sites Patent 1 1 1 1111 3,842,549 Johnston Oct. 22, 1974 [WSANDPAPER HOLDER BLOCK 2,400,929 5/1946 Hein 51/372 3,034,26 5/1962Feeney 51/391 X [76] Inventor: James R. Johnston, 6665 Brooklyn H. 921l4 Ave San Diego Cd 1 Primary ExaminerAl Lawrence Sm1th l Flledi r- 1,1974 Assistant Examiner-Nicholas P. Godici 21 APP] NO: 447 1 9 Attorney,Agent, or FirmRichard K. MacNeill Related US. Application Data [63]Continuation of Ser. Nov 300,449, Oct. 25, l972, [57] ABSTRACTabandoned. A sandpaper holder block having a head portion and a handleportion, the head portion having an anvil [52] US. Cl. 51/392 groovetherein for receiving a protuberance 0n vari- [51] Int. Cl B24d 15/04ously haped anvils with an anvil clamp screw for [58] Field Of Search51/370, 371, 372, 375, locking the head portion around the protuberance;

383, 385, 391-393 first and second paper clamp plates for receivingsandpaper between the head portion and the clamp plates References Citedtogether with a lever cam coupled to a clamping tog- UNITED STATESPATENTS gle pin for clamping the paper clamp plates against the 570,45611/1896 Collins 51/385 P and holding it in fixed Position around one of672,408 4/1901 McAfee h variously shaped anvils.

846,665 3/1907 Hames l.169,()6l 1 1916 Anderson 5I/385 X 2 Clalms, 9Drawlng Flglll'es SANDPAPER HOLDER BLOCK RELATED PATENTS Thisapplication is a continuation of Application Ser. No. 300,449, filedOct. 25, 1972 and now abandoned, by James R. Johnston, for a SandpaperHolder Block.

BRIEF DESCRIPTION OF THE INVENTION The present invention relates to asandpaper holder block and more particularly to a sandpaper holder blockhaving removable variously shaped anvils.

According to the invention, a sandpaper holder block is provided havinga handle portion and a head portion, the head portion having a groovetherein dimensioned for receiving a protuberance on various anvils. Thehead portion is slotted beyond the anvil groove for allowing a clampscrew to clamp the head portion onto the protuberance of the variouslyshaped anvils for holding one of the anvils rigidly in place. The headportion carries first and second clamping paper clamp plates on oppositesides thereon which are coupled together by a clamping toggle pin whichin turn is coupled to a lever cam. After the paper is inserted betweenthe head portion and the clamp plates and around one of the anvils thelever cam is rotated into the lock position which pulls the paper clampplates against the sandpaper holding it in a fixed position for asanding operation.

An object of the present invention is the provision of an improvedsandpaper holder block.

Another object of the invention is the provision of a sandpaper holderblock having removable variously shaped anvils.

A further object of the invention is the provision of a sandpaper holderblock having an improved sandpaper clamp mechanism.

Yet another object of the invention is the provision of a sandpaperholder block which is extremely versatile and simple in operation.

Other objects and many of the attendant advantages of the presentinvention will be readily appreciated as the same becomes betterunderstood by reference to the following detailed description whenconsidered in connection with the accompanying drawings in which likereference numerals designate like parts throughout the Figures thereofand wherein:

FIG. 1 is a side elevation view of the preferred embodiment of thepresent invention;

FIG. 2 is a bottom elevation view of the embodiment of FIG. 1;

FIG. 3 is a top view of the embodiment of FIG. 1;

FIG. 4 is a side elevation view of the anvil shown in FIG. 3;

FIG. 5 is a top view of the embodiment of FIG. 1 in operation; and

FIGS. 6, 7, 8 and 9 illustrate cross sectional views of variously shapedanvils.

DETAILED DESCRIPTION OF THE DRAWING Referring to FIG. 1, handle 11 whichis contiguous with head portion 12 is in two essentially mirror imagedsections (not shown) coupled together by handle assembly screw 13. Headportion 12 carries a paper clamp plate 14 in a clamp slot 15. A noseportion 16 carries an anvil in an anvil slot 18 and is clamped at anvilclamp screw 19.

Referring to FIG. 2, handle portion 11 has a mating half 11A and iscoupled together by assembly screw 13. Head portion 12 has an anvil slot18 for receiving protuberance 21 of anvil 20. Paper clamp plates 14 and14A are coupled together by a clamp toggle pin 22 which is furthercoupled to a lever cam 23 via pivot pin 24.

Referring to FIG. 3, nose portion 16 has a mating half 16A and is shownhaving a slot 26 extending from anvil slot 18. Anvil slot 18 isdimensioned for receiving protuberance 21 of anvil 20. Anvil clamp screw19 threadably engages the nose portion 16A. The nose portions 16 and 16Aare contiguous with handle portions 11 and 11A respectively.

Referring to FIG. 4, anvil 20 has a protuberance 21.

Referring to FIG. 5, the assembly is shown with sandpaper 27 clampedbetween clamp plates 14 and 14A with lever cam 23 in its locked positionand anvil clamp screw 19 (not shown) pulling slot 26 in a closedposition locking protuberance 21 of anvil 20 in position.

Referring to FIG. 6, a protruding circular surfaced anvil is shown at28.

Referring to FIG. 7, a keystone surfaced anvil is shown at 29.

Referring to FIG. 8, an oval shaped surface is shown on anvil 31.

Referring to FIG. 9, a recessed surface is shown on anvil 32.

OPERATION Referring now to FIGS. 1, 2, 3, 4, and 5, it can be seen thatany one of the variously shaped anvils 20, 28, 29,31 or 32 can have itsprotuberance portion 21 received by anvil groove 18 in nose 16. Afterthis is received, anvil clamp screw 19 is tightened pulling the sides ofslot 26 together and clamping onto the installed anvil. It is pointedout here that while anvils are shown as rubber or plastic, any suitablematerial could be utilized. After the anvil is in place, the sandpaper27 (FIG. 5) is pulled between sandpaper clamp plates 13 and 13A and theedge of the head portion 12 and over the front surface of the installedanvil. At this time lever cam 23 is rotated to the position shown indotted lines in FIG. 2 which pulls clamp plates 13 and 13A againstsandpaper 27. The sandpaper is then fixedly held in place across thefront surface of the chosen anvil. The anvil shown in FIG. 5 is utilizedfor corner sanding as shown in proximity to work 33.

It should be understood, of course, that the foregoing disclosurerelates to only a preferred embodiment of the invention, and that it isintended to cover all changes and modifications of the example of theinvention herein chosen, for the purposes of the disclosure, which donot constitute departures from the spirit and scope of the invention.

I claim:

1. A sandpaper holder block comprising:

first and second mating sections, each of said first and second matingsections defining a contiguous head portion and handle portion;

first and second recesses in the head portions of said first and secondmating sections, said first and second recesses cooperating to define ananvil groove when said first and second mating sections are assembled;

an anvil having a protuberance extending therefrom dimensioned for andbeing received by said anvil groove;

coupling means coupled to the head portions of said first and secondmating sections for coupling said 5 first and second mating sectionstogether and clamping and holding said protuberance within said anvilgroove; and

first and second clamp blades carried by said head portion anddimensioned for receiving sandpaper clamping said clamp plates againstsaid paper. =l

1. A sandpaper holder block comprising: first and second mating sections, each of said first and second mating sections defining a contiguous head portion and handle portion; first and second recesses in the head portions of said first and second mating sections, said first and second recesses cooperating to define an anvil groove when said first and second mating sections are assembled; an anvil having a protuberance extending therefrom dimensioned for and being received by said anvil groove; coupling means coupled to the head portions of said first and second mating sections for coupling said first and second mating sections together and clamping and holding said protuberance within said anvil groove; and first and second clamp blades carried by said head portion and dimensioned for receiving sandpaper between said head portion and said clamp blades and around said anvil.
 2. The sandpaper holder block of claim 1 and further including: a clamping toggle pin passing through said clamp plates and said head portion; and a lever cam coupled to said clamping toggle pin for clamping said clamp plates against said paper. 